File:HREMSTEMtoggle.jpg
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| Description |
English: JS/HTML5-simulated brightfield HRTEM (high-resolution or electron phase-contrast TEM on the left) and darkfield STEM (scanning transmission electron microscope on the right) screen shots of the same poly-crystalline sphere in the same orientation, near Scherzer defocus for both the HRTEM sub-specimen imaging-system and for the STEM pre-specimen scanning-probe. Each cluster-of-four-panels has image and diffraction pattern at top, digital-darkfield and image power-spectrum at bottom[1]. The electron-optics simulator allows you to toggle between coherent-brightfield phase-contrast (HREM) and incoherent-darkfield amplitude-contrast (STEM) modes, as shown at left and right (respectively) in the figure above. This is equivalent to reversing the path of electrons through the lens-specimen system, and in the darkfield case rastering the focused beam across the specimen while recording "image pixels" with an annular-darkfield detector. Digital-darkfield analysis of the resulting lattice-images remains possible in both cases. |
| Date | |
| Source | Own work |
| Author | P. Fraundorf |
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I, the copyright holder of this work, hereby publish it under the following license:
This file is licensed under the Creative Commons Attribution-Share Alike 4.0 International license.
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
- ↑ P. Fraundorf, Stephen Wedekind, Taylor Savage and David Osborn (2016) "Single-Slice Nanoworlds Online", Microscopy and Microanalysis 22:S3, 1442-1443 Cambridge hal-01362470 pdf webpage.
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| current | 17:22, 7 October 2016 | | 1,186 × 744 (210 KB) | Unitsphere (talk | contribs) | User created page with UploadWizard |
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